IBM 704 - Manual (Page 75)

Security
Secure Mode
Secure mode secures the system against unauthorized use. Secure
mode inhibits keyboard and mouse input, and disables the power
switch and reset button. Secure mode takes effect when the
keyboard and mouse remain inactive for an amount of time that you
determine. You can gain access to the system only after you enter
the correct user password.
Note: You must set a user password before you can enable secure
mode.
Refer to the following table for information on the options available
for the secure mode.
Options Description
Hot Key Option Specifies a set of keyboard commands that will place the
system immediately into secure mode.
Lockout Timer Specifies a keyboard and mouse inactivity time-out period
of 1 to 128 minutes (in one minute increments). If the timer
is enabled, and no keyboard or mouse activity occurs for
the specified period, keyboard and mouse input is
inhibited.
Secure Boot
Mode When this option is enabled, it disables the keyboard and
mouse after POST completes and the operating system has
loaded.
Enter the user password to unlock the keyboard and
mouse.
Video Blanking Specifies whether secure mode will cause the monitor to
blank out.
Floppy Writes Specifies whether writing to a diskette is enabled or
disabled when the system is in secure mode.
Chapter 3. Configuring Your Server 57